Summary

The Swiss Safety Investigation Board (SSIB) published the Prevention Bulletin 2025/4 Aviation on April 2, 2026. The bulletin documents factual information from preliminary clarifications of aviation incidents for which no full investigation was opened. The bulletins are structured chronologically and contain anonymized data from completed preliminary clarifications of one quarter. The goal is to promote safety awareness in the aviation industry. The German original versions are authoritative.

Persons

  • Swiss Safety Investigation Board (SSIB) (Authority; Publisher)

Topics

  • Aviation safety
  • Accident prevention
  • Incident investigation
  • Safety awareness

Clarus Lead

The SSIB's prevention bulletin system addresses a central efficiency question in safety work: incidents that do not justify formal investigation nonetheless contain usable prevention learning points. Through regular publication of anonymized preliminary clarification results, the SSIB creates structured knowledge transfer to flight operators, maintenance companies, and other aviation stakeholders – without tying up the resources of a full investigation.

Detailed Summary

Prevention bulletins are based on preliminary clarifications according to Article 56 of the Ordinance on Safety Investigation of Incidents in Transport (OSIT). They are only published once the preliminary clarification is completed – typically at the end of a quarter. The bulletins are organized chronologically by incident and contain no personal or identifying data.

The information makes no claim to completeness. Its purpose lies in raising awareness among the affected transport circles – namely aviation companies, air traffic controllers, maintenance operations, and pilots – to recurring safety deficiencies or behavioral shortcomings. Bulletin 2025/4 covers all incidents whose preliminary clarifications were completed in the fourth quarter of 2025.

Key Statements

  • Prevention bulletins utilize preliminary clarification results for safety prevention without using resources on formal investigations
  • Anonymized publication enables knowledge transfer without compromising protection of those involved
  • German original versions are authoritative; translations may vary

Critical Questions

  1. Data Quality: On what basis does the SSIB decide that an incident justifies only a preliminary clarification rather than a full investigation? How is it ensured that critical safety gaps are not overlooked?

  2. Effectiveness of Anonymization: Can aviation companies identify their own incidents from anonymized bulletins and derive specific measures, or does the learning effect remain too abstract?

  3. Completeness and Bias: The bulletin makes no claim to completeness – by what criteria are incidents selected or excluded, and could this lead to systematic gaps?

  4. Implementation in Practice: How is it measured whether the publication of prevention bulletins actually leads to improved safety awareness and reduced accident numbers?

  5. Language Version: What practical implications does the rule that only German versions are authoritative have for operators and personnel in French- or Italian-speaking regions of Switzerland?

Source List

Primary Source: Prevention Bulletin 2025/4 Aviation – https://www.news.admin.ch/de/newnsb/UyFk_N7kysz7Jq9wB4_yu

Verification Status: ✓ April 2, 2026

This text was created with the support of an AI model. Editorial responsibility: clarus.news | Fact-check: April 2, 2026